心前区隆起的常见原因为

A．心肌炎

B．幼年时心脏增大

C．肺心病

D．肺气肿

E．心肌病

Do you have any difficulty ____ these flowers? I'd like to help you if you need. [ ]

A. to plant

B. for planting

C. with planting

D. in planting