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
Tom is a hard-working boy, he always keeps       English.
#50279
A
practice speaking
B
speak
C
practicing speaking
D
practice spoken
Mary used to _____short hair.
#49101
A
be
B
have
C
had
D
has
I’d like a piece of paper____.
#50592
A
to write
B
to be writing
C
to write on
D
to write with
He pretended      English when his father entered.
#50034
A
reading
B
to reading
C
to be reading
D
read
Tom wants ________ you. Are you free?
#48737
A
to speak
B
tell to
C
to talk to
D
talk to