After breakfast with her children, she started ..............to prepare forlunch. 
A. being had
 
B. having had
 
C. have
 
D. had
 
 
 
Question 13. I have a messagefor people by the traffic chaos.
 
A. to delay
 
B. who delay
 
C. delayed
 
D. delaying
 
Question 14. Melanie was theonlyperson a letter ofthanks.
 
A. wrote
 
B. written
 
C. to write
 
D. writing
 
Question 15.If_ to the zoo, our children will be veryhappy.
 
 
 
A. take
 
B. to take
 
C. taking
 
D. taken
 
Question 16.Thedrug from the bark of the cinchona tree, is native to South America.
 
 
 
A. derived
 
B. to derive
 
C. deriving
 
D. which derived
 
Question 17.Front-lineworkers_______________ their life to treating the Covid-19 patients need tobe
 
given much more attention from the public.
 
 
 
A. devote
 
B. devoting
 
C. devoted
 
D. who is devoted
 
Question 18.If_ during the pandemic, schools need to be fully prepared for online courses.
 
 
 
A. close
 
B. closed
 
C. closing
 
D. is closed
 
Question 19. Theonlineconference to the reinvestment of profit was disrupted by the systemcrash.
 
 
 
A. relating
 
B. related
 
C. to relate
 
D. which relate
 
Question20.ThecontractioninChinaisthestarkesteconomicsignofthedamage by the pandemic.
 
 
 
A. caused
 
B. causing
 
C. to cause
 
D. which caused
 
Question21.Those in taking this online course should contact me at555-4573.
 
 
 
A. interesting
 
B. who is interested
 
C. who interested
 
D. interested
 
Question 34.Thevirus from Wuhan (China) killed millions of people in the world just in fivemonths.
 
 
 
A. emerged
 
B. emerge
 
C. which emerging
 
D. emerging
 
Question 35.Toxicchemicals _ into the seas pose a risk to the publichealth.
 
 
 
A. release
 
B. released
 
C. to release
 
D. which released