Tom has much difficulty _______ Chinese so he often asks me ______ help
#50326
A
to understand; with
B
understanding; of
C
to understand; for
D
understanding; for
推荐题目
Every day I spend two hours ______ my homework.
#49479
A
finishingtodo
B
finishingdoing
C
tofinishtodo
D
tofinishdoing
He often spends much time________playing the piano. 
#49131
A
practice
B
practices
C
to practice
D
practicing
I think _______ is good for your health.
#50734
A
getting up late
B
drink more milk
C
eating more fruits
D
to eat more meat
I hear the birds _______.
#51349
A
sing
B
to sing
C
sings
D
singing