136. The government ____ chicken and pork import!s after inspectors found shipments contaminated with chemicals or bacteria.

(A) suspended

(B) gratified

(C) determined

(D) adopted

137. So far, there has been no direct ____ between the police and the demonstrators.

(A) confront

(B) confronts

(C) confronting

(D) confrontation

138. An increasing number of companies are offering customer loyalty programs to ____ existing customers.

(A) vanish

(B) unveil

(C) retain

(D) head

139. ____ it was scheduled to take off at 6 a.m., the plane was delayed due to heavy fog.

(A) There

(B) Beyond

(C) Although

(D) Prominently

140. In the past, it was sufficient to lock down networks and devices, ____ users today want access to data from mobile phones and notebook computers.

(A) which

(B) whereas

(C) whenever

(D) whichever