–What are you busy with these days?-- I ______ study for the coming English test. You know, I’m not good at it.
You’d better wear a pair of comfortable trainers when ________a long walk.
一Look! That teacher is explaining something to her students again and again! 一_______teacher she is!
Though he got up early, ______ he missed the train.
You are _______ out all the difficult problems .
I have problems _______many things. For example, I have problems ________ learning Maths well.