The boy isn’t old enough ________ with the difficult problem by himself.
#50365
A
deal
B
deals
C
dealing
D
to deal
推荐题目
Fruit and vegetables are good for us. We need them __________ healthy.
#48814
A
keep
B
keeping
C
to keep
D
keeps
—Why are you so excited?—Lucy invited me ______ to her birthday party.
#49871
A
to go
B
go
C
going
D
went