The old sailor had never studied navigation, but he had good ________knowledge of it.
A: periodical
B: tropical
C: empirical
D: vertical
A: periodical
B: tropical
C: empirical
D: vertical
举一反三
- If he ( ) the problem well, he couldn't have solved it. A: has not studied B: shouldn't have studied C: had not studied D: were not to study
- William wishes now that he ______ English instead of French when he was in high school. A: have had studied B: studies C: had studied D: studied
- He claimed he had no _______ knowledge of the protest.
- Had he studied hard, he___ the exam.
- ______, he would not have recovered so quickly. A: Hadn't he been taken good care of B: Had he not taken good care of C: Had not he been taken good care of D: Had he not been taken good care of