初级

单选题Questions :
· Read the article below about selling sandwiches.
· Choose the correct word to fill each gap from A, B or C.
· For each question (), mark one letter (A, B or C) on you Answer sheet.

请选择一个正确答案,完成(29)处的填空。

参考答案:B进入在线模考


twice a week为固定搭配,搭配方法为…times a(one)…,比如0nce a month:three times a year.故选B。