Toefl Structure Skills 3 & 4 (part 1)

(A) the quick saturation

(B) quickly becomes saturated

(C) it becomes saturated quickly

(D) to saturate it quickly

(A) often has

(B) often having

(C) to have often

(D) it often has

(A) they circle Saturn

(B) are circling Saturn

(C) circle Saturn

(D) circling Saturn

(A) found

(B) it is found

(C) is found

(D) finds

(A) A force moves an object

(B) For the moving force of an object

(C) A force moving an object

(D) A force is moving an object

(A) The shells were most widely used

(B) Because of the wide use of shells

(C) The shells most widely used

(D) They used shells widely

(A) a sea cucumber is called

(B) is called a sea cucumber

(C) to call a sea cucumber

(D) calling a sea cucumber

(A) were used to

(B) the use of

(C) using

(D) they used

(A) moves an electron

(B) electron is moving

(C) electron moving

(D) electron moves

(A) is acquired

(B) acquired

(C) it is acquired

(D) acquires