Thetwogirlscompetedwitheachother______thehighestmark.
A、for
B、with
C、to
D、against
Ifyouaretoo________ofyourchildren,theywillneverlearntodealwithdifficultiesinlife.
A、respective
B、detective
C、protective
D、effective
Hewouldhavegivenyoumorehelp,ifhe________sobusy.
A、havenotbeen
B、hadnotbeen
C、nothavebeen
D、nothadbeen
Yourbikeneeds_____.You‘dbetterdoirightnow.
A、clean
B、tobeclean
C、beingcleaned
D、toclean
A、乳酸杆菌的生长
B、酵母菌的生长
C、大肠杆菌的生长
D、白色念珠菌的生长