The room was dark，_________ I turned on the lights．

—Have you brought        with you? We won’t have time to come back.—Don’t worry. All the things we need are here, in this big bag.

The boy used to cause a lot of _________/’tr?bl / very much.

_________ is said that most teenagers have problems such as Li Ming’s.

The weather in Yang Zhou is much colder than _____ in Hainan in winter.