By the time he _____ back last night, we had got 200 pictures of the Chang'e-3 lunar probe.
Between the two parts of the concert is an interval, __________ the audience can buy ice-cream.
Ted came for the weekend wearing only some shorts and a T-shirt, __________ is a stupid thing to do in such weather.
The film started to get boring, at __________ point I left the cinema accompanied by my twin sister.
There are 51 students in Class Three, __________ failed in the test.
The Dragon Tower, from __________ top visitors can enjoy a good __________ of Harbin ,attracts hundreds of tourists every day.