Put the verbs in brackets into the correct form

II.  Put the verbs in brackets into the correct form (7 points)

1.   Unless someone (put) the cold in , the fire will go out.

2.  What about ( help)the street children ?

3.   Gustave Eiffel (design) Eiffel Tower in 1889.

4. Give old clothes to charity instead of (throw) them away.

5. we learn how (use) a computer in our computer science class.

6. The man (walk) upstairs is Mr. Quang.

7. Two hours (be)  not enough to finish this task