I don’t think it was an accident at allYour brother did it _____[ ]

My friend ______ from the UK. She studied at Oxford for four years, during which we communicated with each other on the Internet.

In the past few years, sea ice ____ in the Arctic as a result of global warming

Not only Tom but also his parents __________a walk in the park.

I’m sorry I didn’t phone you, but I’ve been very busy_____ the past couple of weeks