Food safety issues, ____ will seriously affect the growth of teenagers and even the nation’s future.
| A．if not solved properly |
| B．not if solved properly |
| C．if solved properly |
| D．not if properly solved |
Thestudentsinourschooleach_________anEnglishdictionary.
| A．have | B．has | C．had | D．arehaving |
Thepairofshoes__________wornout.
| A．was | B．were | C．havebeen | D．hadbeen |
Aprofessorandawriter_________presentatthemeeting.
| A．was | B．is | C．were | D．hadbeen |
Hisfamily________musiclovers.
| A．allare | B．areall | C．is | D．arebeing |
Thosewho_________singingmayjoinus.
| A．areliking | B．likes | C．enjoy | D．isfondof |