China successfully landed a spacecraft ________ Mars in May, 2021.
| A． |
in |
B． |
on |
C． |
at |
D． |
for |
What's your dream job，Lucy？
I want to be doctor．（ ）
A．aB．anC．theD．/
根据所给句意和音标，选出一个最佳答案．
You need to keep /′sailənt/when you are in the library．（ ）
A．sillyB．smileC．smartD．silent
We have a Chinese /′lesn/on Monday morning．（ ）
A．likeB．lunchC．lessonD．listen
I heard the /nju：z/on the radio this morning．That was too bad．（ ）
A．nowB．newsC．noseD．neck
Jerry's bedroom is always /kli：n/．（ ）
A．clearB．cleanC．cleverD．class