He failed in the exam, and I wonder ___ he studied hard in the school.
| A．when | B．that | C．if | D．where |
I’ve been working all day, but I feel as if I _______ nothing.
| A．have been achieved | B．were achieving | C．had achieved | D．am achieving |
－Look! How busy the building workers are!
－Yes, I see. The houses ____ by them will be completed next week.
| A．built | B．being built | C．to be built | D．having been built |
. They ______ to accept me as a full-time student of their university.
| A．rejected | B．refused | C．turned down | D．said no |
No sooner ________in the distance ______a storm began to pour.
| A．a thunder broke; when | B．a thunder had broken; than |
| C．had a thunder broken; than | D．did a thunder break; than |
The CDs are on sale！Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones |