The teacher recommended that each student ______ a plan for the summer vacation.

A) not having eaten B) not have eaten C) not eating D) having not eaten 

A) actual B) natural C)formal D) normal

A)we found

B)did we find

C)have we found

D)we have found

A)where

B)that

C)which

D)how

A)on

B)for

C)at

D)to

A)so

B)what

C)that

D)while

A)being discussed

B)to be discussing

C)having discussed

D)discussing

A)on which

B)by which

C)into which

D)from which

A)so far as

B)now that

C)even if

D)as soon as

A)if

B)until

C)since

D)when