When products made in factories _____, they are thrown away as garbage.
| A．come to an end | B．are put to use |
| C．are used up | D．wear out |
_____ wants to go rafting this weekend, raise your hands, please.
| A．Anyone who | B．Those who | C．Anyone | D．Who |
This problem may lead to more serious ones if ______ unsolved.
| A．making | B．remained | C．keeping | D．left |
Many Chinese universities provide scholarships for students _______ financial aid．
| A．in favor of | B．in honor of | C．in face of | D．in need of |
E-mail, as well as telephones, ______ an important part in daily communication.
| A．is playing | B．have played | C．are playing | D．play |
_____ would be more convenient to place the toilets near the entrance to the cinema for disabled customers.
| A．As | B．That | C．It | D．Which |