With the rapid economic development, there is an _____ of job opportunities. （explode

Researchers have established the() between smoking and cancer.

A link

B chain

C join

D economy

A.interdependent

B.independent

C.nonrelated

D.dependent

Apple is (an economical) fruit.选择能代替括号里的选项

A、a high-priced

B、a costly

C、an economic

D、an inexpensive

He published a series of works in rapid succession.(英译汉)

A.such a rapid

B.so rapid

C.such rapid

D.so rapid a