45. Alan usually _____________ the answers again after he finishes doing the test.(A) is checking (B
【題組B】Lightning and ThunderLightning is a streak of electricity that occurs in every thunderstorm. Al
【題組】52. Why do you see lightning before you hear thunder?(A) Because lightning happens before thunde
【題組】53. Most lightning ____________.(A) occurs after thunder(B) occurs from ground to cloud(C) occur
【題組】54. What can you infer(推論) from this sentence? Although 90% of people survive lightning strikes,
【題組】55. How far is the lightning from your location if you see it in the sky and hear thunder ten se
【題組C】It was a dark, cold night.The snow was falling down silently.Emily stood by the window and look
【題組D】Things You Should Know About Ebola VirusEbola is a very deadly illness that has been recently f
【題組】59. Which person is at high-risk(高風險) of getting Ebola virus?(A) Richard wears face mask when he
【題組】60. Which is correct?(A) Recovered patients(病人) still can give other people Ebola virus for up t
Flying a kite is great fun! People often fly a kite at a park on holidays. Here are some tips on fly