That genetically-modified crops could have harmful effects that can be deduced from the fact that ______. A: cross-breeding is a natural process B: hybrids are generally more successful at breeding than natural plants C: gene movement between cultivated plants and wild ones is inevitable D: new research shows that genetically-modified plants are likely to develop into weeds

The children are always warned the street when the trafic light is red . a. not to cross b. to cross A: not to cross B: to cross

培育出百合品种‘西伯利亚’的公司是 A: VDH B: Mak Breeding C: Marklily D: World Breeding

跨境电子商务的英文名称是（ ） A: Cross Border Commerce B: Cross border Trade C: Cross Border E-commerce D: Cross Border Communication

“cross this square”中“cross”的意思是

St. Andria Cross (The white cross on the blue background) represents _____________

St. George Cross (The red cross on the white background) represents___________.

Be careful when ______ the road. A: [A] crossing B: to cross C: cross

In the movie, Ellie said: ‘cross your heart.’ Here ‘ cross your heart ’ means ________.

Modern existence, with its emphasis on ______ , is a breeding ground for isolation and loneliness.