4．一般情况下，家庭问题多由缺乏交流而引起的。

　　 As a general　　　　　　 , family problems mainly　　　　　　 the 　　　　　　　　of communication.

3．晶体管一直到50年代才被应用于制造更小的收音机。

　　 It was　　　　　 the 1950s　　　 the transistor was　　　　 creating smaller radios.

2．目前， 大量的投资不一定意味着更多就业机会的涌现。

　　 For the time being, mass investment does not 　　　　　mean that more job opportunities will　　　　　　 .

1．这种新药在大量生产前经历了许多医疗实验。

This new medicine has　　　　　 a good many medical experiments before it was produced

　　　　　　　　　　 .

5．I emptied all my drawers and hoped to get back the missing key.

I emptied all my drawers in the　　　　 getting back the missing key.

4．Thought I am tired out after four days’ social practice, I really enjoyed it a lot.

　　 Though I am 　　　　　　after four days’ social practice, I really enjoyed it a lot.

3．In basketball you have to get used to frequent hard knock.

　　 In basketball you have to get　　　　　　 frequent hard knock.

2．In study, developing a good learning habit is better than spending all your time on it.

　　 In study, developing a good leaning habit is　　　　　 spending all your time on it.

1．No sooner had the basketball team appeared on the curt than the whole class waved and cheered.

　　 　　　　　had the basketball team appeared on the court　　　　 the whole class waved and cheered.

10．So far this year we　　　　　 (see)a fall in house prices by between 5 and 10 percent.