The radiation amount of a mobile phone for two half-hour periods per day is equal to ______ to an X-ray for ten seconds.
| A．expose | B．exposing | C．exposed | D．being exposed |
We shouldn't spend our money testing so many people, most of______ are healthy.
| A．that |
| B．which |
| C．what |
| D．whom |
The book was written in 1946, _______ the education system has witnessed great changes.
| A．when |
| B．during which |
| C．since then |
| D．since when |
-Where is my dictionary? I remember I put it here yesterday.
-You ______it in the wrong place.
| A．must put |
| B．should have put |
| C．might put |
| D．might have put |
She asked us not to make any noise _________ waking the baby up.
| A．for fear of |
| B．in fear of |
| C．in fear that |
| D．for fear that |
That guy appears to be an expert in this field of work._______, he knows nothing about it.
| A．So far |
| B．As a matter of fact |
| C．In other words |
| D．At all |