Evidence has been found through years of study______children’s early sleeping problems are likely to
continue when they grow up.
| A．why | B．how | C．whether | D．that |
The engineers are so busy that they have zero time for outdoor sports activities,___they have the interest.
| A．wherever | B．whenever | C．even if | D．as if |
---What do you think of his talk on Information Technology?
---Oh, excellent. It's worth ________．
| A．listening to | B．being listened to | C．listening of | D．to be listened to |
There is little doubt in your mind that he is innocent, ________？
| A．is there | B．isn' t there | C．is he | D．isn' t he |
Although the Eiffel Tower ________ to last for 20 years, it is still standing today.
| A．has designed | B．had designed | C．is designed | D．was designed |
He didn't put the things________they belonged，for________he got his punishment.
| A．which；that | B．what；this | C．that；whose | D．where；which |