Charles the Hammer

1
Both their house and pickup truck (was were)
washed away by Hurricane Katrina.
2
His generosity and compassion (was were)
well known.
3
The logic and practicability of his proposal
(is are) clear.
4
Neither of the twins (was were) allowed to go.
5
Either the parents or I (are am) to blame.
6
Neither the skipper nor his crew (know knows).
7
Each of those who (is are) there should
register.
8
She is one of the most able officials
who (has have) ever held a government
position.
9
He is the only one among the faculty who
(speak speaks) Latin fluently
10
The best part of the meal (is are) coffee and
the small talk after the meal.
11
Coffee and the small talk after the meal
(is are) the best part of a meal.
12
It (is are) the wives who will decide.
13
In the center of the whole complex
(stand stands) the monument to the founder.
14
There (was were) cocktails, peanuts, and
canapes.
15
Happily, there (exist exists) supporters who
have sworn to help us.
16
The gang (has have) a request.
17
The gang (is are) checking in anytime now.
18
The family (is are) surnamed Co.
19
The family (is are) seated on the lawn.
20
This is one of the most popular concoctions
that (has have) ever come out of the
laboratory in years.