Mr. Green _______ his lessons when I went into his office.
#36585
A
prepares
B
prepared
C
is preparing
D
was preparing
推荐题目
 John, ______, you should eat less meat but more vegetables.
#38669
A
keep healthy
B
keeps healthy
C
keeping healthy
D
to keep healthy
_____ your sister _____ playing the piano these days?
#40241
A
Is, practise
B
Does, practises
C
Is, practising
D
Does, practised