Why not _______ your teacher for advice when you don’t know _______ the problems?
I love swimming in summer. Nothing could be_____ than that!
--- I’m going on a trip to Beijing soon. ---_______.
— What do you like to do in your leisure time? — I enjoy ____ with my friends.talk B. to talk C. having talked D. talking
I can’t understand ____ you’re talking about.what B. that C. if D. because
--- I don’t know if he ____. --- He’ll come if it ___.