The building ________ top can be seen from here has just been completed.
| A．whose | B．which | C．that | D．where |
The young couple, who returned my wallet, left _____ I could ask for their names.
| A．before | B．while | C．after | D．since |
It was really a great to all the teachers and parents that no students were injured in the accident.
| A．help | B．relaxation | C．relief | D．favor |
According to a recent survey, homework is ______ students most often blame for their lack of sleep．
| A．why | B．that | C．what | D．which |
All the books donated by the students from urban schools are said ________ to the students in the earthquake-stricken areas the other day.
| A．to have been sent | B．being sent |
| C．having been sent | D．to be sent |
I will be surprised if you can get Calvin, who is a close-fisted man, ________ these donation draw tickets from you.
| A．buy | B．buying | C．to buy | D．buys |