WeChat Pay（微信支付）makes our life convenient．We can buy things _______ we don't take any money．（ ）
A．unlessB．becauseC．even ifD．so that
China successfully landed a spacecraft ________ Mars in May, 2021.
| A． |
in |
B． |
on |
C． |
at |
D． |
for |
As an old saying goes, "He who has never been to ________ Great Wall is not a true man."
| A． |
a |
B． |
an |
C． |
the |
D． |
/ |
﹣﹣﹣Could you tell me _____ ？
﹣﹣﹣Yes.We are going to visit the red boat on South Lake in Jiaxing next week.（ ）
| A． |
why we'll celebrate our Party's 100 birthday |
| B． |
how we'll celebrate our Party's 100 h birthday |
| C． |
when will we celebrate our Party's 100 birthday |
| D． |
where will we celebrate our Party 's 100 birthday |
﹣﹣﹣This math problem _______ in half an hour.
﹣﹣﹣Don't worry.Mr.Wang is good at math.He can make it.（ ）
| A． |
is working ou |
B． |
would work out |
| C． |
should be worked out |
D． |
has worked out |
﹣﹣﹣______ nice weather it is to go hiking!Would you like to go with me？
﹣﹣﹣Good idea!Let's go.（ ）
| A． |
How a |
B． |
How |
C． |
What a |
D． |
What |