Grammar mistakes of this kind _____ widely among Chinese students.
| A．have been made | B．has been made | C．have made | D．has made |
QQ,______you can chat with your friends, makes communication easy.
| A．why | B．which | C．that | D．where |
Someone________his car in front of my house and it is blocking my driveway.
| A．has parked | B．is parking | C．parked | D．had parked |
The film is very humorous but_________can be enjoyed unless you understand English culture.
| A．everything | B．something | C．nothing | D．anything |
---Your composition is full of mistakes.
---I wish I_________more careful.
| A．would have been | B．had been | C．would be | D．were |
______life began on the earth is one of the biggest puzzles to scientists.
| A．How | B．What | C．Where | D．That |