1. I like watching TV. There is a good film on TV tonight.

   • Corrected option: B

2. How many childs does your mother have? How many children does your mother have?

   • Corrected option: A

3. We have Geography every Wednesdays. We have Geography every Wednesday.

   • Corrected option: C

4. If you climb the mountain, you will see a lot of flowers.

   • Corrected option: B

5. There are five bridge across Han River in Da Nang. There are five bridges across the Han River in Da Nang.

   • Corrected option: A

So, the corrected sentences are:

1. I like watching TV. There is a good film on TV tonight.
2. How many children does your mother have?
3. We have Geography every Wednesday.
4. If you climb the mountain, you will see a lot of flowers.
5. There are five bridges across the Han River in Da Nang.

1. I like watching TV. There are a good film on TV tonight. There is a good film on TV tonight.

A (There are a) is incorrect because the sentence should use the singular form "is" instead of "are".

1. How many childs does your mother have? How many children does your mother have?

A (childs) is incorrect because the correct word is "children".

1. We have Geography every Wednesdays. We have Geography every Wednesday.

B (Wednesdays) is incorrect because the correct day of the week is "Wednesday".

1. If you climb the mountain, you will sees a lot of flowers. If you climb the mountain, you will see a lot of flowers.

C (sees) is incorrect because the correct verb is "see".

1. There are five bridge across Han River in Da Nang. There are five bridges across the Han River in Da Nang.

D (bridge) is incorrect because the correct word is "bridges".