6．The little boyhesitated to ask questions because he felt shy in presence of a large crowd of peopl——青夏教育精英家教网——

6．The little boyhesitated to ask questions because he felt shy in presence of a large crowd of people．（hesitation）

5．The government has takeneffective action to reduce pollution and improve our environment．（effect）

4．The little boy isbored with doing so many exercises assigned by his parents．（boredom）

3．Beauty consultantsremarkthat regular physical exercise and a balanced diet can guarantee better looking skin．（remarkable）

2．Do notoverdrythe hair； otherwise the hair will become too dry and weak．（dry）

1．It requires a lot ofconcentrationto complete the task．（concentrate）

20．When you arecommunicating in a foreign language，gestures a can help you express yourself．（communication）

19．Itis/has been years since much useful information was sent back to earth through the satellite．（be）

18．The first time I travelled to Japan，Iwas impressed by the Japanese quality．（impress）

17．If you don't want to be considered rude，you'd betternot hold your eye contact for 3seconds plus．（not hold）

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