Nowadays，it is common to see people staring at their mobile phones instead of reading a real book，＿＿＿＿＿＿many experts are worried．
| A．when | B．for which | C．where | D．about which |
相关试题
—Do you like ______ here?
—Oh, yes. The air, the weather, the way of life. Everything is so nice.
| A．this | B．these | C．that | D．it |
The chairman thought necessary to invite Professor Smith to speak at the meeting.
| A．that | B．it | C．this | D．him |
No progress was made in the trade talk as neither side would accept the conditions of .
| A．others | B．the other | C．either | D．another |
Ten years ago the population of our village was_____that of theirs.
| A．as twice large as | B．twice as large as |
| C．twice as much as | D．as twice much as |
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