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—Why, my new computer is rubbish! Five hours has passed and it still hasn’t finished the downloading.
—Don’t worry. You know, sometimes the Internet ________ be very slow.
A．canB．mayC．shouldD．must
A
考察情態(tài)動(dòng)詞。Can考察；表示可能性。結(jié)合句意可知A正確。句意：—為什么？我的新電腦真是垃圾。四個(gè)小時(shí)過(guò)去了還是沒(méi)有下載完�！�?jiǎng)e擔(dān)心。你知道的，有時(shí)候網(wǎng)絡(luò)也可能很慢。
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