Birds' singing is sometimes a warning to other birds ______ away.
#94926
A
to stay
B
staying
C
stayed
D
stayed
推荐题目
The manager listened to the customers’ complaints attentively with great patience, _______ to miss any point.
#90706
A
not trying
B
trying not
C
to try not
D
not to try
People in Nome all had diphtheria, a disease that spreads very fast. If ________, it would produce a powerful poison that would kill the patient.
#95630
A
untreating
B
to untreat
C
untreated
D
untreat
I’m considering _____a teacher after graduation because a teacher is often considered _____ the engineer of the human soul.
#89752
A
to become ; to be
B
becoming ; to be
C
to become ; being
D
becoming;being
Noticing some passers-by gathering on the road, Jill looked forward _______ what was the matter.
#96138
A
to find out
B
to finding out
C
only to find out
D
finding out
Cycling is a good way of exercise and is quite easy _________.
#93435
A
to do
B
to be done
C
doing
D
being done