I’m told that languagepractisingcom is a free website ______learners can not just learnvarious languages but also chat online

intelligent people can often ________ the complex, a fool is more likely to complicate the simple

I ________ use a clock to wake me up because at six o’clock each morning the train comes by my house. (2012·新课标全国，30)

How many students have passed theexamination — _______.

Don’t forget the door before you go to bed.