Sue practises______the violin hard and often gives wonderful performances．（ ）
| A． |
play |
B． |
played |
C． |
to play |
D． |
playing |
To keep children away from danger，we warn parents ________ children at home alone．（ ）
A．leaveB．to leave
C．not leaveD．not to leave
Computers are very useful．They can help us get much ________ on the Internet．（ ）
A．gamesB．information
C．courageD．messages
What's the meaning of"One Belt and One Road"？
Let me ________ the words in the new dictionary．（ ）
A．look atB．look forC．look afterD．look up
The volunteers ________ a lot of help to the old and the young since 2010．（ ）
A．offeredB．have offered
C．are offeringD．will offer
Of all the drinks，tea is ________ in the world．It has a history of about 5，000 years．（ ）
A．oldB．olderC．the oldestD．very old