13. As a matter of fact, I've been going to the gym for a year now.
事實上，至今為止我到體育館健身有一年了。
還能這樣說：
The truth is that I have been in the gym for a year now.
In fact, I have been working out in this gym for a year now.
應用解析：
fact of life 生活常識；
in point of fact 事實上，實際上；
matter of fact 實際情況，真相；
a fact of life 生活的現實；
the facts speak for themselves 事實本身自明
14. The key to do exercise is to do it regularly.
運動的重點是有規律。
還能這樣說：
The most important thing in doing exercises is regularity.
Doing exercises regularly is very important.
應用解析：
keep regular hours 過有規律的生活；
as regular as clockwork 極有規律
15. He goes to the gymnasium every afternoon to sweat off some weight.
他每天下午去健身房以減輕一點體重。
還能這樣說：
In order to lose some weight, he goes to the gymnasium every afternoon.
Every afternoon he goes to the gymnasium to work off surplus fat.
應用解析：
sweat blood 拼命工作；
throw sb. into sweat 使某人發汗；
sweat over sth. 辛苦工作；
sweat one's guts out 拼命干
16. How do you feel after you have ridden this stationary bike?
你騎了固定自行車之后感覺如何？
還能這樣說：
What is your feeling after having ridden this stationary bike?
Can you express your feeling after you have ridden the stationary bike?
應用解析：
ride high 成功；
take sb. for a ride 欺騙；
ride out 安然度過；
ride up 衣服向上拱，衣服縮上去；
let sth. ride 對某事物不立即采取行動；
ride at anchor 拋錨停泊；
ride for a fall 魯莽行事
17. What do you think of the facilities here?
你覺得這兒的設備怎么樣？
還能這樣說：
What is your opinion on the facilities here?
How do you think about the facilities here?
應用解析：
think ahead to sth. 預見，預想；
think back to sth. 想起并重新考慮某事，反思；
think for oneself 獨立思考；
think out 仔細考慮某事，想出；
think sth. over 慎重思考某事