My uncle _____ to see me. He’ll be here soon.
Electric trains have now ______ steam ones in most countries in the world.
Only ____ did she realize the stress he was_____.
He _____ some French when he was on a visit to France.
The transportation will improve a lot in Changzhou, with another three bridges ________ over the Grand Canal in the near future.
Our teacher has _________ some very difficult questions to ask us.