Children’s brains can’t develop properly_______ they lack protein(蛋白质).
| A．when | B．since | C．because | D．unless |
相关试题
Though he was disabled, he was never satisfied ______ he did the best of a normal child.
| A．after | B．until | C．unless | D．when |
Could ______ that have a say in the decision do us a favor about the problem?
| A．whomever | B．anyone | C．whoever | D．someone |
Which do you enjoy ______ you weekend, doing sports or watching TV?
| A．to spend | B．spending | C．spend | D．spent |
She ______ stop whomever she met to tell the story about her Ah Mao.
| A．can | B．could | C．would | D．must |
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