The authorities feared that concerns about air pollution might ______ with smoggy weather continuing.
A. edit B. recover
C. erupt D. install
The happiness from helping others is a kind of inner relief that can _______ our heart.
A. smooth B. mend
C. choke D. soothe
With most of his time ____ in playing basketball, he failed in the exam.
A. to waste B. wasted
C. wasting D. having wasted
(2017·北京)Many airlines now allow passengers to print their boarding passes online ________ their valuable time.
A. save B. saving
C. to save D. saved
He got up very early and hurried to the station，only ______ his train was cancelled.
A. telling B. to be told
C. having told D. to tell
Newly-built wooden cottages line the street, ________ the old town into a dreamland.
A. turn B. turning
C. to turn D. turned
