All Mrs Smith's efforts to tidy the room were _____ because her grandson soon made a mess of it again.
| A．at all costs | B．at random |
| C．in vain | D．in return |
Though_______ money, his parents managed to send him to university.
| A．lacked | B．lacking of | C．lacking | D．lacked in |
Nature reserves are very important for preserving many animals and plants, which would _______ run the risk of becoming extinct.
| A．otherwise | B．therefore | C．though | D．instead |
My boss was very resistant to my proposal at first but she finally_____and accepted my idea.
| A．slowed down | B．put down | C．got down | D．broke down |
—These days I feel exhausted and lack strength.
—That’s _____too much drinking and poor diet lead.
| A．what | B．which | C．why | D．where |
Yue Yue, ____2yearold girl who was twice run over by vans and then ignored by 18 passersby as she lay critically injured on a street, draws_____ concern from all over the country.
| A．/；/ | B．a；the | C．a；/ | D．the；a |