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1. **Question 46**: Cutting out waste in energy consumption means that business costs can cut, so it helps reduce costs.
A. Cutting out
B. means
C. can cut
D. good business sense

2. **Question 47**: From Houses to Homes is a charity building healthy homes and improving access for health care and education.
A. due to
B. global warming, the average temperature on Earth may be risen by as much as 7°C by the end of the 21st century.
C. May be risen
D. by the end

3. **Question 49**: There have been great improvements in science. Yet, it is still impossible to forecast earthquakes accurately.
A. Although
B. has significantly developed
C. still unable to accurately predict
D. be impossible

4. **Question 50**: He hasn't been to a musical festival since he visited Germany three years ago.
A. he went to a musical
B. last time he went to a
C. since he visited
D. the musical festival