Artemisinin _______ by Tu Youyou，a great Chinese scientist．（ ）
A．was inventedB．invented
C．has invented
They had to _____ their school trip because of the bad weather．（ ）
| A． |
put up |
B． |
put off |
C． |
put away |
The old lady ______ the hospital in time at last．（ ）
| A． |
is taken to |
| B． |
took to |
| C． |
was taken to |
Must I return the book to you now？
____, you_____．You can do it tomorrow．（ ）
| A． |
No； needn't |
| B． |
No；mustn't |
| C． |
Yes；must |
My family _____ for dinner now． We're busy．（ ）
| A． |
is preparing |
| B． |
are preparing |
| C． |
prepares |
Will you go to the movies tomorrow？
If you don't go, _____．（ ）
| A． |
neither do I |
| B． |
neither won't I |
| C． |
neither will I |