Which of the following serves as the best title for this text?
A．Causes of Unemployment
B．A Study on Unemployment
C．A Study on Social Involvement
D．Impact of Unemployment on Social Participation

未分类题The main purpose of the author in writing this text is toA．introduce dinosaurs and their homeland in Dorset and East Devon.B．describe the natural history, geology and the beauty of the Jurassic Coast.C．suggest that people take an adventure to Jurassic Coast alone.D．advertise the charm of Jurassic Coast and attract more tourists to go there.

未分类题劳动力辞职的原因有（ ）。

未分类题According to Lennon, we can inferA．landslips are helpful to visitors while visiting Jurassic Coast.B．the best time to visit Jurassic Coast is tide season.C．bad weather can make dinosaur fossils loose, thus more difficult obtained by tourists.D．finding dinosaur fossils can help tourists know more about the formation of the coast.

未分类题集体谈判是指那两方的谈判（ ）。B.工会C.雇主或雇主组织D.公司

未分类题Which of the following is the first step of the bypass operation?A．Thread up through the aorta to the top of the diseased artery.B．Push a needle through artery wall into the adjacent vein.C．Put a special catheter into one of the leg arteries.D．Block off the vein to allow blood to re-routed.