My American friend Sam is quite interested in Nanjing. He wonders _______.
A.when was the Confucius Temple built
B.How high is the Purple Mountain
C.that Nanjing was very rich in ancient times
D.who built Dr. Sun Yat-sen's Mausoleum
— Why is Sandy absent from school today?
—He is in hospital.He hurt ______ when doing DIY at home yesterday.
A.his B.he
C.himself D.him
Don't touch the instruments in the laboratory ________ the teacher allows you to do that.
A.unless B.when
C.though D.because
The ________ you work, the more trust and praise you will get from your workmates.
A.more careful B.more carefully
C.most carefully D.most careful
—What beautiful flowers! I can’t decide ________ for my mom.
—For Mother’s Day, it can’t be better to buy some carnations.
A.when to choose B.which to choose
C.how to choose D.to choose what
—______ I see your ID card, sir?
—No problem. Here you are.
A.Can B.May
C.Need D.Must