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 |
Seeing the picture ,she could resist _____.
| A．laughing | B．to laugh | C．laughed | D．being laughed |
--Could you do me a favor?
--It depends on _____it is.
| A．which | B．whichever | C．what | D．whatever |
_____at what he said,she asked him why he said so to her.
| A．Amazing | B．Amazed | C．Having amazed | D．Surprised |
Soon , Mary _____ the shock and became calm again.
| A．recovered | B．recovered from | C．affected | D．covered from |
The children were surprised by the sudden _____ of their teacher.
| A．enter | B．entrance | C．entry | D．come |