A. be cleaned B. would be cleaned C. is cleaned D. will be cleaned
A. didn’t believe B. wasn’t believing C. should not believe D. were not believing
A. leave B. left C. leaving D. had left
A. invites B. invited C. invite D. inviting
Although B. Therefore C. Though D. Since
A. known B. know C. knew D. knows
A. been B. had been C. has been D. was
A. even though B. if only C. only if D. even if
A. only if B. if only C. though D. although