In the factory, the helmets the workers wore varied _____ color according to their different posts.
| A．from | B．in | C．with | D．alongside |
______ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
| A．If | B．While | C．Because | D．As |
People were not allowed to enter the reading room because it .
| A．had been painted | B．was being painted |
| C．was painting | D．painted |
The teacher suggested English from time to time every day.
| A．having read | B．us to read | C．our reading | D．being read |
Occasions are quite rare ____ I have the time to spend a day with my kids.
| A．who | B．which | C．why | D．when |
Of the 9,500 drivers since the beginning of the year, 23% were found lacking road
knowledge.
| A．test | B．testing | C．tested | D．were tested |