The____ofAIDShasledtoanexpansioninresearchseekingacure.
A、innovation
B、selection
C、proliferation
D、conviction
It’snecessary______ustokeepourpetscleaneveryday.
A、of
B、for
C、with
D、between
Peopleinsomeareasdon’thavetopayfortheir______.
A、medicinetreat
B、medicaltreat
C、medicinetreatment
D、medicaltreatment
As____clearfromhismanners,heisateacher.
A、being
B、is
C、tobe
D、been
Mr.Greenisusedto_________twoapplesafterluncheveryday.
A、eat
B、eating
C、eaten
D、ate