When Marx was in London, he __ read at the library for hours.
A high-tech exhibition ________in the National Museum now. Let’s go and visit it.
Luckily, only a few passengers aboard were ________ injured in the traffic accident.
What is your daughter doing now? She is on the phone, ________with one of her schoolmates.
Receiving good treatment, she was beginning to ________ and soon came back to work.
Mary enjoys home-made food, so she seldom, ________, eats out.