问题

John’s success has nothing to do with good luckIt is years of hard work _______has made him a great scientist today

A:that
B:when
C:which
D:why

正确答案是：

同类题型

下列关于文学、文化常识的表述错误的一项是（）

39.It’s demanded that we____________thereon foot.40.

Mr Black has two sons, one of ________working as adoctor.

We couldn’t take a bus to go home because _________ ofus had any money in our pockets.

I expected Mark_____his tanlents in the competition，but he did not appear.