Principal White has been working in the school for about 20 years, ____all his energy to teaching and researching as well as the running of a healthy school.
A．devoted B．devoting C．to devote D．devote
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
