In the old days, people lived in caves and they had to make a fire _________themselves warm. 
#50642
A
to keep
B
keeping
C
keep
D
kept
推荐题目
—What club do you want ___________?—A chess club, please!
#48809
A
join
B
to join
C
joining
D
joined
Mr Li taught me     in the river when I was a child.
#49893
A
to swim
B
swam
C
swimming
D
swims
Tom is a hard-working boy, he always keeps       English.
#50279
A
practice speaking
B
speak
C
practicing speaking
D
practice spoken