The radiation amount of a mobile phone for two half-hour periods per day is equal to ______ to an X-ray for ten seconds.
#91571
A
expose
B
exposing
C
exposed
D
being exposed
推荐题目
Fans crowded the street outside, ______ a look at their hero.
#96427
A
waiting for
B
waited for
C
to wait for
D
to be waiting for
I don’t want to listen a long story — just _____ me the result. 
#97450
A
tell
B
telling
C
to tell
D
to be telling
 All reference books ________, he didn't find the key to the question.
#88808
A
being searched
B
searched
C
to be searched
D
were searched