Pick out ONE best option (A, B, C or D) to complete each sentence: Find creative ways to reuse old items before ... them away

Question 1. Pick out ONE best option (A, B, C or D) to complete each sentence:
1. Find creative ways to reuse old items before ___________ them away.
A. putting             B. keeping                        C. throwing             D. getting
2. If we are hungry, we _________ tired.
A. feel                  B. feels                         C. felt                          D. will feel
3. Will he be free next week ? - ____________
A. No, he isn't                            B. No, he doesn't                            C. No, he won't                            D. No, he be not
4. Robots can___________ our houses when we are away.
A. see                             B. guard                      C. look at                      D. look
Question 2. Supply the correct form of tense of the verbs in brackets:
5. He (go) __________________ to Ha Long bay many times.
6. Nam (buy) __________________ a new dress 5 days ago.