Attention, please! And keep ________ when I am taking a photograph of you.
A.still | B.calm | C.quiet | D.silent |
_____ he is very busy, he spends at least two hours every day surfing the Internet in order to find out the latest development in science and technology.
A.Even though | B.When | C.Unless | D.Whether |
Several weeks had gone by _____ the head of the gallery realized the painting was missing.
A.after | B.before | C.since | D.that |
The airline has a booklet _____ will tell you most of the important information to Europe.
A.in which | B.about which | C./ | D.that |
Students can easily fall behind in their studies ____ they don’t manage their spare time carefully.
A.though | B.if | C.since | D.until |
He warmly congratulated them on _____ they had achieved in science and technology.
A.that | B.where | C.what | D.which |