My pen pal Andrew found it difficult ______ Chinese well
#50638
A
learning
B
learn
C
to learn
D
learned
推荐题目
The best way ______ your English is _____ an English club.
#49697
A
to improve . to join
B
improving , joining
C
to improve , join
D
improving, to join
She is often seen ______ the old woman.  
#50014
A
help
B
helping
C
to help
D
help to
Did you finish _____your homework last night? 
#49966
A
do
B
does
C
doing
D
done