问题
I took mathematics and physics because I think that _______very important for me to make furtherresearch in this field.[ ]
A: that is
B: they are
C: this
D: which are
B: they are
C: this
D: which are
正确答案是：
同类题型
On ______ way home, Mr. and Mrs. Black meet an old friend.
Your house is always so clean and everything is in order – how do you ______ it with these children
I’ve been waiting here____ morning; theyhaven’t showed up yet.
33. I can’t go to bed with an mind until I know she’s safe.
Do youwant tea or coffee— _______Whichever one you’re making