Nominal clauses(名词性分句), adjective clauses(形容词性分句) and adverbial clauses (副词性分句)are classified based on their different __________.

A. functions (作用)
B. forms(形式)
C. structures (结构)
D. positions(位置)

Which can indicate the sentence is a subordinating compound sentence(从属复合句)?

A. two predicates (谓语)
B. two subject-predicate structures(主谓结构)
C. two equal subject-predicate structures
D. two unequal subject-predicate structures

The team cannot work effectively_____ it is free from this kind of interference.

A. so long as
B. so that
C. unless
D. because

What makes the middle school proud is that more than 80% of the students have been admitted to key universities. 两处划线部分（1：what…proud，2：that…universities）分别是什么从句?

A. 主语从句,宾语从句
B. 宾语从句,表语从句
C. 主语从句,表语从句
D. 宾语从句,同位语从句

Whether we can succeed or not depends on how hard we work at it. 两处划线的部分分别是什么从句?

A. 主语从句,表语从句
B. 主语从句,方式状语从句
C. 宾语从句,主语从句
D. 主语从句,宾语从句

We should try to get a good sleep __________ much work we have to do.

A. however
B. no matter
C. although
D. whatever

They are told that they should follow the main road ________they reach the university.

A. whenever
B. until
C. while
D. wherever

用恰当的并列连词完成句子: Do it yourself ____（或者）ask somebody else to do it.