______ April 22nd，people around the world celebrate Earth Day in different ways．（ ）
A．InB．AtC．On
I like dumplings ___ my grandmother cooks．（ ）
| A． |
that |
B． |
who |
C． |
where |
D． |
when |
The sea is large and full of water．It covers about ___of the planet．（ ）
| A． |
three fourth |
B． |
three fourths |
| C． |
third fourth |
D． |
third fourths |
My friend Henry was born ___June，1997．（ ）
| A． |
in |
B． |
on |
C． |
at |
D． |
for |
___is it from your school to your home？
About two kilometres．（ ）
| A． |
How soon |
B． |
How often |
C． |
How far |
D． |
How long |
___is difficult for him to finish the homework in such a short time．（ ）
| A． |
It |
B． |
This |
C． |
That |
D． |
What |