If we can our present difficulties , then everything should be all right .
| A．get away | B．get over | C．get off | D．get on |
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 |
If only he _____ to send that letter to my grandpa, my grandpa will come to help me. Look, I’m so helpless now.
| A．remembered | B．remembers | C．has remembered | D．had remembered |
______ he realized it was too late to return home.
| A．Not until dark | B．It was until dark that | C．It was not until dark that | D．It was dark that |
Several of the off-shore islands are ______ , now that we have a motor boat.
| A．available | B．accessible | C．convenient | D．achievable |
It’s already 10 o’clock, I wonder how it ____ that she was two hours late on such a short trip.
| A．came over | B．came out | C．came about | D．came up |