It is often recommended that children ________chances to get close to nature.
#87722
A
are offered
B
be offered
C
should offer
D
must be offered
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-----He should have come to join in the thorough cleaning. -----He________, I think. It’s not his turn.
#88328
A
needn’t have to
B
needn’t have
C
didn’t have to
D
doesn’t need to
 I have lost one of my gloves. I _____ it somewhere. 
#89289
A
must drop
B
must have dropped
C
must be dropping
D
must have been dropped