---- Mummy, can I go out for a play for a while?
---- Yes, if you _______. But make sure you e back before 8:00.
| A．shall | B．will | C．must | D．could |
He moved to Germany in _____, when he was in _____.
| A．the late 1990s; his sixties | B．late 1990s; his sixties |
| C．the late 1990s; the sixties | D．late 1990s; the sixties |
The most important thing about cotton in history is _____ part that it played in
_____ Industrial Revolution.
| A．不填; 不填 | B．the; 不填 | C．the; the | D．a; the |
It’s already 10 o’clock. I wonder how i____________that she was two hours late on such a short trip.
| A．came over | B．came out | C．came about | D．came up |
_______ what would happen, none of them could find a way out.
| A．Left wondering | B．Having left wondering |
| C．Leaving to wonder | D．Having left to wonder |
Students who pass the test will be ______to the next grade, as has been announced.
| A．possessed | B．promoted | C．proposed | D．allowed |