It is well understood _____ controls the flow of carbon dioxide in and out the atmosphere today.
| A.that | B.when | C.what | D.how |
Be __________. After all, he is a little boy.
| A.accurate | B.patient |
| C.neat | D.athletic |
Although difficult, she finished the job on time, so I think that she certainly deserved __________.
| A.being praised | B.to be praised |
| C.to praise | D.having praised |
The doctor suggested that he shouldn't __________ in bed for long.
| A.keep on lying | B.keep lying |
| C.keep to lie | D.keep lie |
So sudden __________ that the residents had no time to escape.
| A.was the earthquake | B.did the earthquake |
| C.the earthquake did | D.the earthquake was |
Scarcely had she heard the sad story when she __________ crying.
| A.burst into | B.burst out |
| C.broke out | D.broke into |