青蛙能在水中产卵，卵能发育成蝌蚪，蝌蚪能生长成青蛙，长大的青蛙又能产卵。这一过程主要体现了青蛙的哪一生命现象( )
| A．排出体内废物 | B．繁殖 | C．生长 | D．生长和繁殖 |
-Could you please tell me _____________？
-At 8：00 p．m．（ ）
| A． |
when the train will leave |
| B． |
where will the train go |
| C． |
where the train will go |
| D． |
when will the train leave |
Thanks to our teachers．_____________ their help，we couldn't make such great progress．（ ）
| A． |
For |
B． |
Without |
C． |
With |
D． |
About |
-Daddy，can you come home for supper with us this weekend？
-________，but I might be a little late．
| A． |
I'm busy |
B． |
Hard to say |
| C． |
Of course |
D． |
never mind |
Help others in need，_____________ they will help you when you are in trouble．（ ）
| A． |
although |
B． |
but |
C． |
and |
D． |
or |
-It's quite an interesting party!
-_____________．Why don't you join us？（ ）
| A． |
So it is |
B． |
Congratulations |
| C． |
Hold on，please |
D． |
Good luck |