Выберите правильный союз.
1.Since / Just as there’s too much work to do, we won’t go on holiday.
2.I’d better take an umbrella in саse /whether it rains.
3.Just keep an eye on the baby while / whereas I cook the supper, will you?
4.Many of the children feel more confident if / though they work in groups.
5.Although / in order that he hasn’t said anything, he seems to be upset about it.
6.You must be careful while / unless you wash this delicate silk blouse.
7.I’d like to find out when / even if the classes begin.
8.By / as long as the time you receive this letter, I’ll have left for Japan.
9.At last, after / as long as he had tried three times, he passed his exam.
10.The manager didn’t offer him the job because / although his appearance was very untidy.