• A. They live in two different countries
• B. They work as cleaning experts
• C. They do voluntary work
• D. They work at conservation full time

Answer: Option C

Explanation:

• A. determine
• B. sway
• C. vary
• D. develop

Answer: Option A

Explanation:

• A. teaching them about important scientific discoveries
• B. teaching them to think logically and correctly
• C. teaching young people some truths about the universe
• D. teaching them about scientific appliances

Answer: Option C

Explanation:

• A. They look after animals
• B. They mend bridges
• C. They study man and nature
• D. They plant trees

Answer: Option C

Explanation:

• A. Food scarcity in Singapore
• B. Lack of food security in Singapore
• C. Diversification of food sources in Singapore
• D. Singapore’s food imports and exports

Answer: Option C

Explanation:

• A. would have
• B. have
• C. used to have
• D. do have

Answer: Option A

Explanation:

• A. Among
• B. Upon
• C. Looking
• D. Between

Answer: Option A

Explanation:

• A. For
• B. At
• C. About
• D. Of

Answer: Option B

Explanation:

• A. will live
• B. live
• C. would live
• D. used to live

Answer: Option D

Explanation:

• A. reach out to
• B. live up to
• C. put up with
• D. make up for

Answer: Option D

Explanation:

• A. to. and
• B. back
• C. towards, but
• D. in,to

Answer: Option A

Explanation:

• A. affects, effects
• B. effects, affects
• C. affects, effects
• D. effects, effect

Answer: Option C

Explanation:

• A. irrational
• B. simple
• C. homeless
• D. mystified

Answer: Option C

Explanation:

• A. hot mudflows
• B. stinking mud
• C. stinking muck
• D. melted rock

Answer: Option B

Explanation:

• A. Cities are crowed
• B. Farm land is scarce
• C. People eat a lot
• D. People live in poverty

Answer: Option B

Explanation: