Scientists say they are beginning to _____ in the fight against cancer.
| A．break in | B．break out | C．break down | D．break through |
The life we were used to ______ greatly since 1980.
| A．change | B．has changed |
| C．changing | D．have changed |
_______useful the information he gave us is !
| A．What a | B．How | C．What | D．How an |
-----Do you know _____ this teddy bear belongs to? -----Let me see. Oh, it’s _____.
| A．whose, mine | B．whose, me |
| C．who, mine | D．who, me |
Where is my ________other sock? I can’t find it.
| A．an | B．the | C．a | D．/ |
Excuse me. Could you tell me ______?
| A．what does the planet Mars look like |
| B．what the planet Mars looks like |
| C．how does the planet Mars look like |
| D．how the planet Mars looks like |