There are several factors _______ in the economy _______ make it difficult to predict the future.
#96479
A
operate; where
B
operating; which
C
to operate; that
D
operated; what
推荐题目
 _________working all day long, he fell asleep as soon as he lay on the bed.
#89761
A
Getting tired of
B
Getting tired from
C
To get tried of
D
To get tired from
_____ into many languages , the book is popular with young people.
#93331
A
Having been translated
B
Having translated
C
To be translated
D
Been translated