问题
My father likes smoking. He often says that giving up smoking is the easiest thing in the word. I know because I________ it thousands of times.
A:have done
B:am doing
C:will do
D:do;
B:am doing
C:will do
D:do;
正确答案是：
同类题型
This is a very interesting bookI’ll buy it，
______ returning home, she found a note _________ to the door, reading: “Call in later.”[ ]
Being detemined is a kind of quality and that’s ________ it takes to do anything properly.
Sam spends _____ money ______ CDs than Daniel.
I can’t give you an answer right now I’d like more time to consider my decision