The Tianwen﹣1 Probe landed on Mars___________ May 15th，2021.
| A． |
at |
B． |
in |
C． |
to |
D． |
on |
What shall we do this weekend？
We'll drive to Dongjiang Lake boating．（ ）
A．to goB．goC．going
There are many tall trees on sides of the river．（ ）
A．bothB．allC．either
The harder we study，the result we will get．（ ）
A．goodB．betterC．best
Who's the woman under the tree？
She's aunt．（ ）
A．Kelly and Joe'sB．Kelly's and Joe
C．Kelly's and Joe's
Amy will be an elder sister．Her parents are going to have child．（ ）
A．twoB．secondC．the second