一患者上颌局部义齿修复，义齿戴时，发现上腭后部弯制的腭杆离开腭黏膜2mm，处理方法是

A．不做处理，让患者把义齿戴走

B．腭杆组织面加自凝树脂重衬

C．腭杆组织面缓冲

D．取下腭杆

E．取下腭杆后，戴义齿取印模，在模型上重新加腭杆

One of my teammates fell ill _______ he can't practice with us now. [ ]

A. so that

B. however

C. instead of

D. never mind