I have to study_____ my math test_____ Thursday evening.[ ]

Two hundred yuan for such a T-shirt! You ______ be joking!－I’m not joking . It’s made of silk.

______ does Mary go to the Bubby Club? — Once a week. [ ]

What color is _______ orange?—It’s____ orange.

There is clear evidence _____ smoking does harm to our health.