Ling found introductions and greetings were quite easy _______in English
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Nowadays, older _______ people don't use"How do you do?"among themselves
The Millers often _______barbecue during the week
When you see somebody you know after a short _________time,say"How are you?”
绒毛膜促性腺激素(HCG)与妊娠期间分泌量达高峰的时间是
A. 妊娠5～7周
B. 妊娠8～10周
C. 妊娠11～13周
D. 妊娠14～16周
E. 妊娠16~18周
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