Evidence has been found through years of study_____children's early sleeping problem is likely to continue when they grow up.
| A．why | B．how | C．whether | D．that |
It was not until all the fish died in the river_____the villagers realized the serious pollution.
| A．where | B．that | C．what | D．which |
The doctor came up and asked me ______the day before.
| A．what had I eaten | B．what I have eaten |
| C．what have I eaten | D．what I had eaten |
The pupil is clever enough to______all these numbers correctly.
| A．add up | B．add to | C．add up to | D．add |
Last Sunday morning we all_____Mr Wang’s wedding,including the managers.
| A．joined | B．took part in | C．attended | D．joined in |
Mr. Smith suggested the problem worth paying attention ______ at the meeting.
| A．to be discussed | B．to being discussed | C．being discussed | D．be discussed |