It was not until 1920 ___ regular radio broadcasts began.
| A．while | B．when | C．that | D．since |
相关试题
Women’s earnings are well below men’s _____ educational difference that are decreasing between the two sexes.
| A．in favor of | B．in case of | C．in terms of | D．in spite of |
---How much salt did you put in the s
oup?
---I’m sorry to say, _____. I forgot.
| A．none | B．not a bit | C．nothing | D．no |
Despite the fact that Lucy is a lovely girl, she _____ be extremely difficult to work with sometimes.
| A．must | B．should | C．would | D．can |
Environmental groups intend to _____ the pressure until the government changes the law.
| A．keep up | B．make up | C．pick up | D．bring up |
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