It is necessary ______ us to help our friends out when they meet difficulties．（ ）
A．toB．ofC．withD．for
We will achieve our Chinese Dream earlier if all of us ．（ ）
A．pull togetherB．pulls together
C．pulled togetherD．will pull together
It's easy to travel from Beijing to Shanghai by taking the high﹣speed railway．
Yes， it's about ．（ ）
A．eight hours rideB．eight hour's ride
C．eight﹣hours rideD．eight hours' ride
Music makes our life colourful， and helps us to relax． ， English songs can also help us learn English．（ ）
A．ExceptB．BesidesC．AsD．But
I'm afraid his radio is too noisy． Will you please tell him to a little？
OK．（ ）
A．turn it downB．turn it up
C．turn it onD．turn it off
There is something wrong with your bike， ？（ ）
A．is thereB．Is it
C．isn't thereD．isn't it