问题

Samples of blood from Cholera infected patients have been sent to the blood center _______. [ ]

A: to be checked
B: to be examined
C: to test
D: being tested

正确答案是：

同类题型

The school should ____ immediately to the parents’ request that students not attend classes on Sundays.

Binhai RT-Mart Supermarket (大润发超市) has been open ________.

_____ he is very young, _____ he knows a lot about science.

Have you heard of Loulan?— Of course. It is believed _____ many years ago. [ ]

lease let us, Lily and me, go to visit thenew provincial museum tomorrow,