I _____your offering to help, David, but I’m sure I can manage it myself. Thanks all the same.[ ]

下列各句中，没有语病的一句是（ ）

It shouldn’t take long to clear up after the party if we allvolunteer to help—–That’s right______________

We study something about Qin Shihuang from our _____________ lesson.

According to the weather report, there is likely to be heavy rain tomorrow—_______, we’ll have to change the plan for the outgoing