The young trees should ______well as often as possible.
A. be water B. watered C. watering D. be watered
Tony used to _______ to school, but he is used to _______ to school now.
A. walk; taking a bus B. walked; took a bus
C. walk; take a bus D. walked; taking a bus
My grandpa is _________ weak ______ look after himself．He needs help．
A．so, that B．very, to C．so, to D．too, to
When they heard the ___________ news，they got very ___________．
A．frustrating, frustrated B．frustrated, frustrated
C．frustrated, frustrating D．frustrating, frustrating
I don't know _______.Can you tell me________?
A. how swim; what to do B. how to swim ; what to do it
C. how to swim; what to do D. what to swim; how to do
. ----How do you improve your listening skills, Mary?
----I often do it _______ tapes and English radios.
A. by hearing B. in listening to
C. by listening to D. for listening
