----Have you fed the cat? ----No, but______.
Two middle-aged passengers fell into the sea. ____, neither of them could swim.A. In fact B. Luckily . Naturally D. Unfortunately
-What are on show in the museum?-Some pictures ____ by middle-school students.A. taking B. having been taken . taken D. being taken
Even if you are an experienced teacher, you sometimes ____ make some mistakes.A. can B. must . should D. will
His parents put a lot of effort into getting him ____ to a key school.
Some of the students have already learned enough English to ____a conversation with a native English speaker.