_______tired the doctor was after he did a 6-hour operation attentively!
A.How B.What C.What a D.How a
It’s a bad _______to stay up late, even if you are using that time to study.
A.health B.hobby C.habit D.honor
Sarah and I play tennis together regularly, but _______ of us can play very well.
A.both B.neither C.either D.none
The atmosphere lets sunlight in and keeps warmth _______ getting out.
A.by B.in C.through D.from
Listen, boys, washing hands is a good way to protect _______ from the disease.
A.yours B.your C.yourself D.yourselves
He has been to ______ university to visit his professor for several times since graduation.
A.the B.a C./ D.an
