Sure! Here are the correct forms of the words in brackets:

### CDT 9
1. Will you wait a minute while I **look**?
2. The teacher said that we should **not make** noise in class.
3. Look at those black clouds. It **is going to rain**.
4. The film **begins** at 7.30 or 8.00 this evening?
5. Mai **will telephone** you when she comes back.
6. The pens **produced** by Thien Long Company are usually cheap and good.
7. "Do you mind if I sit here?" - "I'd rather you **didn’t sit** so much noise."
8. The price **is becoming** more and more expensive these days.
9. I've decided **to stop** smoking.
10. This is the second time you **have broken** a cup.

### CDT 10
1. People always **blame** their circumstances for what they **are**.
2. Will you **let** me know the minute you **hear** any news?
3. When I entered his room, I **saw** him **sleeping** in a chair.
4. We don't enjoy using as cheap labor. I **have been informed** that they postponed **the delivery** of our furniture.
5. I can't help **feeling** sorry for the hungry children. If only there **were** peace in the world.
6. I will ring the bell one more time. If he **doesn't answer**, I think he must **be** out.
7. The vase **broke** when it **was moved** to the other room.
8. What do you **think** you **will do** in ten years' time?
9. I realized that someone **had stolen** my wallet when I **felt** it missing.
10. I think that as he **will leave** next week, he certainly **will come** to say goodbye.

### CDT 11
1. She **has collected** stamps for 12 years and she **has collected** thousands of stamps.
2. I'm not surprised he **failed** the exam. He **hasn’t worked** hard recently.
3. When he arrived, he **asked** me how long I **had waited**.
4. While I **was watering** the garden, a stranger **came** to the house with this message.
5. At this time tomorrow, I **will be** in Hanoi **attending** a conference.
6. I'd rather you **told** the boys **not to make** so much noise.
7. This is the first time I **have eaten** a meal **cooked** by a Japanese cook.
8. When Tom **returns** next week, I'm sure we **will complete** all the work.
9. I don't like **being treated** as if I **were** a child.
10. My mother **is not** in her room at the moment. She **is cooking** in the kitchen.

### CDT 12
1. If it **doesn't rain** so much, we **will have** a better crop.
2. Did you remember **to send** me a card when you **were** on holiday?
3. I **have never read** a book **written** by Nguyen Du.
4. It's time we **started**. Otherwise, we **will miss** the last bus home.
5. I can't bear **to sit** at home all day **doing** nothing.
6. When we **got** downstairs, the burglar **had disappeared**.
7. I **was walking** to school yesterday when suddenly I **saw** John.
8. Listen. I **think** I can hear someone **shouting** over there.
9. By the time he **comes** back next week, I **will have finished** all the work.
10. Today you **look** as if you **were** an actress.