.The building burnt down in a big fire. _________was the base on which it stood.
(浙江卷19). Playing on a frozen sports field sounds like a lot of fun. Isn't it rather risky, __________.
(浙江卷[来源11). Do you think shopping online will __ take the place of shopping in stores?
(浙江卷6). I have been convinced that the print media are usually more __ and more reliable than television.
(天津卷5). People have always ______ about exactly how life on earth began.
(陕西卷22). Studies show that people are more to suffer from back problems if they always sit before computer screens for long hours.