Our skin, if ______ to sunlight for a long time, can become darker.
| A．exposes | B．exposing |
| C．being exposed | D．exposed |
No matter how frequently _____ the works of Beethoven always attract a large number of
people.
| A．performing | B．performed |
| C．to be performed | D．being performed |
Under no circumstance _____ to tell lies to parents.
| A．children are allowed | B．are children allowed |
| C．children will allow | D．will children allow |
"_____ your meeting is!" he offered them his sincere congratulations.
| A．How a great success | B．What a great success |
| C．How great success | D．What great success |
From my point of view，the theory thatby the scientist is not quite scientific．
| A．was risen | B．brought up |
| C．had been raised | D．was put forward |
Tom’s mother often requires that hemore time in studying English every day．
| A．spend | B．spends | C．spending | D．spent |