Parents should always tell their kids ________ with strangers．（ ）
| A． |
not to talk |
B． |
not talking |
| C． |
to not talk |
D． |
not talk |
Could you give me a few ______ on how to spend the coming summer holiday？
OK．Let me see．（ ）
A．hobbiesB．knowledge
C．suggestionsD．information
Nowadays China has about 25，000 kilometers of high﹣speed railways．
That's ______of the world's total．（ ）
A．two thirdB．two﹣thirdC．two thirdsD．two three
President Xi Jinping paid______important visit to the US in 2017．
And he was warmly welcomed by Donald Trump，_____45th American president．（ ）
A．a； theB．an； theC．the； aD．an； a
I wonder______．
I' m not sure yet．（ ）
A．which is hersB．which hers is
C．Whether is it hersD．whether hers it is
Do you know where the last two pictures went？
A millionaire bought _____of them． He thought they were worth．（ ）
A．eitherB．eachC．noneD．both