Fill in the Blanks

 -  Ans. E (taking advantage of something when there is an appropriate situation)

Can and could is used to express the ability and lack of ability. But for past could is used. Hence, could is correct answer.

Should is used to express a prediction or expectation that something will happen. Hence, should is the correct answer.

Should is used to give advice about something you think wrong or unacceptable. Hence, it is the correct answer.

As the subject is surfer or the swimmer which is plural. So, the correct verb is are because "is" is used with singular.

"Must" is used to express necessity or requirement. Hence, it is the correct answer.

Can is used to ask permission or give permission and it sounds informal.

Subject is Democrats and Republicans which is plural. As it is continuous tense (1st form of verb + ing) so, are is correct answer.

May is use to express formal permission or formal prohibition. Hence, it is the correct answer.

Would is used to express habitual past action. Hence, it is the correct answer.

To make a suggestion when there is no better alternative may is used.

Shall is used to offer of assistance or polite suggestion when you are quite sure of a positive answer.

"Must" is used when you are almost 100% certain. Hence, it is correct answer.

Subject is ripe tomatoes, leafy brussels sprouts, and a handy orange which is plural. Hence, are is correct answer.

Two accidents means plural verb will be used. "Have" is correct answer.