There are so many foggy days recently．We all wonder_________．（ ）
A．how is the air polluted
B．why the air is seriously polluted
C．what can we do to prevent that bad weather
D．what are the real reasons
I hate watching TV ads．It's just a waste of time．
．Some are quite amazing．（ ）
A．Good ideaB．I agree with you
C．That's OKD．I didn't think so
Richard is studying in Germany．I wonder ．
On the phone．（ ）
A．how his parents keep in touch with him
B．why his parents keep in touch with him
C．how do his parents keep in touch with him
D．why do his parents keep in touch with him
Sandy，the glass is broken．How did that happen？
Sorry，Mum．I don't know．I outside．（ ）
A．playB．was playing
C．have playedD．am playing
The couple will be away for a while and they need someone the baby．（ ）
A．look afterB．looking after
C．looked afterD．to look after
What do you think of our hotel？
Good! I'm especially satisfied with the high of your service．（ ）
A．levelB．speedC．praiseD．price