Stephen Hawking was famous a scientist， he made a great contribution to the world， and he died March 14 th， 2018．（ ）
| A． |
for； on |
B． |
as； in |
C． |
as； on |
Welcome you all to China and enjoy ________ here．（ ）
| A． |
yourself |
B． |
yourselves |
C． |
themselves |
D． |
himself |
You _______ write the report again because spelling mistakes are not allowed at all．（ ）
A．mayB．canC．mustD．could
Parents should always tell their kids ________ with strangers．（ ）
| A． |
not to talk |
B． |
not talking |
| C． |
to not talk |
D． |
not talk |
He was so angry that he could say_________．（ ）
| A． |
anything |
B． |
nothing |
C． |
something |
D． |
everything |
He has many friends at school．_____？（ ）
| A． |
has he |
B． |
does he |
C． |
doesn't he |
D． |
isn't he |