You never know how much difficulty we had ___the problem．Luckily, we managed to solve it with his help.
A． working out B． work out
C． worked out D． to work out
I‘m not sure _________ next week.
A． whether will he come
B． whether he will come
C． if will he come
D． if he comes
Nancy doesn’t want to buy the skirt because ______ the colour ______ the size fits her.
A． both…and B． either…or
C． neither…nor D． not only…but also
—As a teacher, we can’t be _______ patient with our students．
A． quite B． too
C． very D． so
It’s believed that our moods are sometimes _______ by colours．Many scientists are doing research on this subject.
A． chosen B． influenced
C． required D． explained
Don’t be crazy about computer games, ________ you will fall behind others in study.
A． and B． so C． but D． or
