The newly-built lab is ______ the old one.
| A．three times so big as | B．as three times big as |
| C．three times bigger than | D．three times the size |
“Things never come again.” I couldn’ t help talking to myself.
| A．lost |
| B．losing |
| C．loss |
| D．missed |
Mother wanted to be a good provider, a role she since her marriage to Father.
| A．shoulders |
| B．shouldered |
| C．is shouldering |
| D．has been shouldering |
The first use of atomic weapons was in 1945, and their power increased enormously ever since.
| A．is |
| B．was |
| C．has been |
| D．had been |
It was reported that 8 policemen were sent to the forest the missing girl.
| A．to search |
| B．to search for |
| C．searching |
| D．searching for |
Scientists are convinced _ the positive effect of laughterphysical
and mental health.
| A．of; at |
| B．by; in |
| C．of; on |
| D．on; at |