—When is Tree Planting Day?—It’s ____________ March.A.in B.on C.at
While we were running on the playground, Jack suddenly stopped____ and lay on the ground,so we all stopped_____ what was wrong with him.
-Last night someone broke into our house. -Oh, dear! Anything?
-Will you please help me to repair the computer now? -Sorry, I’m too busy and I haven’t a minute to _______.
Food safety is important. Rules____ to stop people from food pollution.
He went into his room,_____ the light and began to work.