When it comes to “empty-nest syndrome(综合症)”, parents are advised to _______regular contact with children through phone calls, emails, texts or video chats.
| A．substitute | B．sacrifice | C．associate | D．maintain |
相关试题
Though young, he succeeded in taking the machine skillfully and then put it together without any 
difficulty.
| A．out | B．down | C．apart | D．up |
There is no doubt the boxes were then put on a train for Konigsberg, was at that time a German city on the Baltic Sea.
| A．whether, which | B．that, where | C．that, that | D．that, which |
She__________ Robert for ten years.
| A．married | B．married with | C．has been marrying | D．has been married to |
—What do you think of the book?
—Oh, excellent．It’s worth a second time．
A．to read |
B．to be read | C．reading | D．being read |
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