The young mother won't leave her baby _______ she is sure that he has already been asleep．（ ）
A．unlessB．becauseC．ifD．since
The Internet is so closely connected with our daily life.Can you ______a life without it？
A．imagineB．expectC．understand
﹣Could I ride an electric bicycle to school，Mr．Wang？
﹣No，you _____．Students under the age of 16 aren't allowed to ride electric bicycles．（ ）
A．couldn'tB．needn'tC．can't
﹣__________the government，the last 98.99 million people were helped out of absolute poverty（绝对贫困）.
﹣You are right.China had achieved a "complete victory" in fighting against poverty by the end of 2020.
A．In order toB．Thanks to
C．According to
— Our school is going lo hold the ____________Culture Festival.
— I see.And we can take part in the activity again.
A．fiveB．fifthC．fifths
一 Look，Betty has a new mobile phone﹣Huawei Mate 40 Pro.How nice it is!
一 Yes.Her mother bought ___________ for her progress.
A．itB．oneC．this