There is ____ Mr. Smith at the door who wants to speak to you.
| A．a some | B．certain | C．some a | D．a certain |
With the aim of getting high marks, most Chinese students were ________ lacking creativity.
| A．picked up | B．taken up |
| C．brought up | D．built up |
__________ you understand the rule, you will have no further difficulty.
| A．While | B．Once |
| C．Though | D．Unless |
—Tony, you must have noticed the student who broke the window.
—I’m sorry. I _______ attentively.
| A．studied | B．was studying |
| C．am studying | D．would study |
He didn’t seem to mind_____________ TV while he was trying to study
| A．them to watch | B．that they watch |
| C．their watching | D．watching |
Staying one day in a Shangri-la Hotel costs _______ renting a house in my hometown for a month.
| A．as much as three times | B．three times the price of |
| C．as many three times as | D．the three times price of |