You can use PROC IMPORT to read all the variables, then KEEP the ones you want.
PROC IMPORT OUT= WORK.test /* your SAS data set */
DATAFILE= "C:\temp\test.csv" /* replace with your input data set name */
DBMS=CSV REPLACE;
GETNAMES=NO;
DATAROW=1;
RUN;
data test;
set test (keep=var1 var7 var11);
run;
VAR is the default variable name prefix when the first row is not variable names.
Jan