31) Madame Curie was completely engrossed in her work.
32) Strive for excellence.
(A) Cooperate with others
(B) Be patient
(C) Make efforts
(D) Pay well
33) It is very discourteous to intrude during someone's conversation.
(A) find fault
(C) be in the way
(D) leave quickly
34) In certain types of poisoning, immediately give large quantities of soapy or salty water in order to induce vomiting.
35) Feeling irritable may be a side effect of too much medication.
36) Preservatives are added to bread to keep it from getting stale.
37) The examination will begin precisely at eight-thirty.
38) Most competitions are not open to both professionals and non-professionals.
39) A balanced diet should include fish and fowl as well as red meat.
(D) cheese and milk
40) Although buses are scheduled to depart at a certain hour, they are often late.