Don’t use water to put out the fire if oil catches fire. As is known, oil ____ float on water.

You’d better ________ right after supper.

Mike ______have stolen the money from the bank,______he appeared to be rich overnight.

--- Shall I take your iPad to the shop to be repaired?--- Thanks, you _________. There is nothing wrong now.]

 ---_______I come back before five o’clock? ---No, you ________. But you________ be back later than seven o’clock