It was not until it stopped raining ______ we left for home. A. when B. then C. after D. that

_____ to come and repair the pipe in the bathroom.
A plumber is the person who repairs pipes.
A. plumber

The plumber _____ the blossoming flowers.
"Admired" fits as the plumber notices the nice flowers before working.
A. admired

When it _____ raining, we left them.
"Stopped" makes sense to leave after the rain ends.
A. stopped

_____ in bed for hours when mother came back.
Past perfect continuous tense for an action in progress before another past action: had been lying.
A. had been lying

Even his cat _____ twenty years old has bad teeth.
Relative clause needed: who is.
A. who is

The exam _____ so hard.
Simple past tense for singular subject: was.
A. was

The thieves _____ by this time.
Present perfect for action completed by now (plural subject): have fled.
A. have fled

The exam(ination) _____ so hard.
Simple past tense: was.
A. was

The thief(es) _____.
Present perfect singular thief or plural: has fled / have fled. From context singular thief, has fled.
B. has fled

The room was either swept by the learners _____ the cleaner.
"Either...or" structure for alternatives.
B. or

Would you prefer singing _____ dancing?
"Prefer A to B" grammar structure.
B. to

35. A
36. A
37. A
38. A
39. A
40. A
41. A
42. A
43. B
44. B
45. B