Question

It’ s suggested by experts that teenagers ____at least 30 minutes exercising, five times a week.

A．spend

B．to spend

C．spent

D．have spent

Answer 1

A

试题分析：suggest后的从句用虚拟语气，should+do,should可省略。指advise, suggest, propose, recommend，demand, require, request等后的宾语从句，从句谓语由“should+动词原形”构成，其中的should在美国英语中通常可以省略
点评：本题难度适中。虚拟语气是高考常考的内容，需要考生熟记它们的各种情况，多记多练，还必须会分析理解句子的成分。
即学即练：It is strongly recommended that the machines____ every year.
A. check        B. should be checked       C. checked     D. shouldcheck
解析：B。句意：建议每年一定把机器检修一次。