What happened next？
The heavy snow didn't ___the international airlines．（ ）
A．pay attention toB．add to
C．make a difference toD．keep to
Ants are pretty small． You might think that they _______ be rather weak． But what you might not know is that ants are actually very strong for their size． （ ）
A．needB．can'tC．must
Tennis can exercise all of our muscles （肌肉）． And it requires ________ to spend time with others． This is good for our health too． （ ）
A．oursB．usC．we
A recent survey shows that 44 percent of Americans want to use self﹣driving cars，_______ 34 percent believe that they will make the roads more dangerous． （ ）
A．althoughB．becauseC．if
I'm getting hungry． Do you know where we can get some good food？
Of course! There _________ a restaurant around the corner． （ ）
A．will beB．wasC．is
If I leave my house at 9 o'clock and drive to the airport， I'll arrive at about 11． So it's about two __________ drive from my house to the airport． （ ）
A．hoursB．hour'sC．hours'